Just a minor bug: when I created a transparent button, gave it a background color of white with opacity of 25%, then saved. Later, I came back and deleted the 25%, which caused the form to default to 0 again. Normally, I can save the settings at this point, and the default setting of 0 is accepted. In this case however, I received the following error: “This field is required.” Typing in a value of 0 fixed the issue.
Like I said, very minor bug, but it was a glitch in the user experience. With margins and paddings, when I delete a value I input, the default value is accepted and saved in settings. I expected the same behavior in this case too.